Triazine ultraviolet absorbers useful for improving the sun protection factor of textiles

ABSTRACT

New compounds having the formula ##STR1## in which m is 1 or 2; when m is 1, A is a residue selected from those of the formulae ##STR2## and, when m is 2, A is a residue of the formula ##STR3## B is --O--, --NH-- or --SO 2  --, and D is as defined herein, are useful as ultraviolet absorbing agents (UVAs) and a method of improving the sun protection factor of textile fibre material by treating the material with the new compounds.

The present invention relates to new compounds which are useful as ultraviolet absorbing agents (UVAs) and to a method of improving the sun protection factor (SPF) of textile fibre material treated with the new compounds.

It is known that light radiation of wavelengths 280-400 nm permits tanning of the epidermis. Also known is that rays of wavelengths 280-320 nm (termed UV-B radiation), cause erythemas and skin burning which can inhibit skin tanning.

Radiation of wavelengths 320-400 nm (termed UV-A radiation) is known to induce skin tanning but can also cause skin damage, especially to sensitive skin which is exposed to sunlight for long periods. Examples of such damage include loss of skin elasticity and the appearance of wrinkles, promotion of the onset of erythemal reaction and the inducement of phototoxic or photoallergic reactions.

Any effective protection of the skin from the damaging effects of undue exposure to sunlight clearly needs to include means for absorbing both UV-A and UV-B components of sunlight before they reach the skin surface.

Traditionally, protection of exposed human skin against potential damage by the UV components in sunlight has been effected by directly applying to the skin a preparation containing a UV absorber. In areas of the world, e.g. Australia and America, which enjoy especially sunny climates, there has been a great increase in the awareness of the potential hazards of undue exposure to sunlight, compounded by fears of the consequences of alleged damage to the ozone layer. Some of the more distressing embodiments of skin damage caused by excessive, unprotected exposure to sunlight are development of melanomas or carcinomas on the skin.

One aspect of the desire to increase the level of skin protection against sunlight has been the consideration of additional measures, over and above the direct protection of the skin. For example, consideration has been given to the provision of protection to skin covered by clothing and thus not directly exposed to sunlight.

Most natural and synthetic textile materials are at least partially permeable to UV components of sunlight. Accordingly, the mere wearing of clothing does not necessarily provide skin beneath the clothing with adequate protection against damage by UV radiation. Although clothing containing a deeply coloured dye and/or having a tight weave texture may provide a reasonable level of protection to skin beneath it, such clothing is not practical in hot sunny climates, from the standpoint of the personal comfort of the wearer.

There is a need, therefore, to provide protection against UV radiation for skin which lies underneath clothing, including lightweight summer clothing, which is undyed or dyed only in pale shades. Depending on the nature of the dyestuff, even skin beneath clothing dyed in some dark shades may also require protection from UV radiation.

Such lightweight summer clothing normally has a density of of less than 200 g/m² and has a sun protection factor rating between 1.5 and 20, depending on the type of fibre from which the clothing is manufactured.

The SPF rating of a sun protectant (sun cream or clothing) may be defined as the multiple of the time taken for the average person wearing the sun protectant to suffer sun burning under average exposure to sun. For example, if an average person would normally suffer sun burn after 30 minutes under standard exposure conditions, a sun protectant having an SPF rating of 5 would extend the period of protection from 30 minutes to 2 hours and 30 minutes. For people living in especially sunny climates, where mean sun burn times are minimal, e.g. only 15 minutes for an average fair-skinned person at the hottest time of the day, SPF ratings of at least 20 are desired for lightweight clothing.

It is already known, e.g. from WO 94/4515, that the application of specified types of UVA to a light-weight textile materials in general can effect an increase in the SPF value of the textile so treated. The increase in SPF value achieved thereby, however, is relatively modest.

Certain new compounds have now been found which can be readily produced and which, unexpectedly, impart greatly increased SPF ratings to textile fibre materials treated with the new compounds.

Accordingly, the present invention provides a compound having the formula: ##STR4## in which m is 1 or 2; A is a residue selected from those having the formulae ##STR5## in which R is phenyl, optionally substituted by 1 or 2 C₁ -C₄ alkyl groups, preferably tolyl or xylyl, or by 1 or 2 C₁ -C₁₈ alkoxy groups, or R is a group having the formula ##STR6## X is F, Cl or NHCH₂ OH and X₁ is F, Cl, NHCH₂ OH or a group having formula: ##STR7## B is --O--, --NH--or --SO₂ --; and D is a group having one of the formulae: ##STR8## CH₂ --C(═O)--NH(CH₂ OH), CH₂ --(═O)--N(CH₂ OH)₂ or --CH₂ CH₂ --OSO₃ M in which M is hydrogen, sodium, potassium, calcium, magnesium, ammonium, mono-, di-, tri- or tetra-C₁ -C₄ alkylammonium or ammonium that is di- or tri-substituted by a mixture of C₁ -C₄ alkyl and C₁ -C₄ hydroxyalkyl groups, preferably sodium, or, when A is a residue of formula (5) or (6), D may also be a group of formula: ##STR9## in which B and M have their previous significance and n is 0 or 1, provided that at least one SO₃ M group is present, or the formula ##STR10## in which X, X₁ and M have their previous significance; provided that the following compounds are excluded:

a) those in which A is a residue of formula (2), (3) or (4), B is --O-- and D is a group of formula ##STR11## CH₂ --C(═O)--NH(CH₂ OH) or CH₂ --C(═O)--N(CH₂ OH)_(2;)

b) the compound 4-glycidyloxy-2-hydroxy benzophenone; and

c) the compound 2-(2-hydroxy-4-glycidyloxy)-4,6-(2,4-dimethylphenyl)- 1,3,5-triazine. Preferred compounds of formula (1) include those having one of the formulae: ##STR12## in which R has its previous significance and D₁ is a group having the formula ##STR13## CH₂ --C(═O)--NH(CH₂ OH) or CH₂ --C(═O)--N(CH₂ OH)_(2;) ##STR14## in which D₁ has its previous significance; ##STR15## in which D₁ has its previous significance; ##STR16## in which X is F or Cl and B and M have their previous significance and in which preferably X is Cl, B is NH and M is Na; ##STR17## in which n has its previous significance, provided that at least one group --SO₃ M is present, X is F or Cl and X₁ is F, Cl or a group having one of the formulae: ##STR18## in which B and M have their previous significance; ##STR19## in which each X is the same and is F or Cl and each X₁ is the same and is F, Cl or a group having one of the formulae ##STR20## in which B and M have their previous significance, or ##STR21## in which M has its previous significance but is preferably Na.

The compounds of formula (1) may be produced by reacting, under known reaction conditions, a compound of formula A-(BH)_(m) in which A, B and m have their previous significance, with m moles of a compound L-D, in which D has its previous significance and L is a leaving group or atom, preferably a halogen atom, especially a chlorine atom.

The starting materials A-(BH)_(m) and L-D are known compounds which are readily available.

The present invention also provides a method for the treatment of a textile fibre material, comprising treating the textile fibre material with 0.05 to 3.0% by weight, based on the weight of the textile fibre material, of one or more compounds having the formula (1).

The textile fibres treated according to the method of the present invention may be natural or synthetic fibres or mixtures thereof. Examples of natural fibres include vegetable fibres such as cotton, viscose, flax, rayon or linen, preferably cotton and animal fibres such as wool, mohair, cashmere, angora and silk, preferably wool. Synthetic fibres include polyester, polyamide and polyacrylonitrile fibres.

Preferably, textile fibres treated according to the method of the present invention have a density of less than 200 g/m² and have not been previously dyed in deep shades.

Some of the compounds of formula (1) used in the method of the present invention may be only sparingly soluble in water and may need to be applied in dispersed form. For this purpose, they may be milled with an appropriate dispersant, conveniently using quartz balls and an impeller, down to a particle size of 1-2 microns.

As dispersing agents for such sparingly-soluble compounds of formula (1) there may be mentioned:

acid esters or their salts of alkylene oxide adducts, e.g., acid esters or their salts of a polyadduct of 4 to 40 moles of ethylene oxide with 1 mole of a phenol, or phosphoric acid esters of the adduct of 6 to 30 moles of ethylene oxide with 1 mole of 4-nonylphenol, 1 mole of dinonylphenol or, especially, with 1 mole of compounds which have been produced by the addition of 1 to 3 moles of styrenes on to 1 mole of phenol;

polystyrene sulphonates;

fatty acid taurides;

alkylated diphenyloxide-mono- or -di-sulphonates;

sulphonates of polycarboxylic acid esters;

addition products of 1 to 60, preferably 2 to 30 moles of ethylene oxide and/or propylene oxide on to fatty amines, fatty amides, fatty acids or fatty alcohols, each having 8 to 22 carbon atoms, or on to tri- to hexavalent C₃ -C₆ alkanols, the addition products having been convened into an acid ester with an organic dicarboxylic acid or with an inorganic polybasic acid;

lignin sulphonates; and, in particular

formaldehyde condensation products, e.g., condensation products of lignin sulphonates and/or phenol and formaldehyde; condensation products of formaldehyde with aromatic sulphonic acids, e.g., condensation products of ditolylethersulphonates and formaldehyde; condensation products of naphthalenesulphonic acid and/or naphthol- or naphthylaminesulphonic acids and formaldehyde; condensation products of phenolsulphonic acids and/or sulphonated dihydroxydiphenylsulphone and phenols or cresols with formaldehyde and/or urea; or condensation products of diphenyloxide-disulphonic acid derivatives with formaldehyde.

Depending on the type of compound of formula (1) used, it may be beneficial to carry out the treatment in a neutral, alkaline or acidic bath. The method is usually conducted in the temperature range of from 20 to 140° C., for example at or near to the boiling point of the aqueous bath, e.g. at about 90° C.

Solutions of the compound of formula (1), or its emulsions in organic solvents may also be used in the method of the present invention. For example, the so-called solvent dyeing (pad thermofix application) or exhaust dyeing methods in dyeing machines may be used.

If the method of the present invention is combined with a textile treatment or finishing method, such combined treatment may be advantageously carried out using appropriate stable preparations which contain the compound of formula (1) in a concentration such that the desired SPF improvement is achieved.

In certain cases, the compound of formula (1) is made fully effective by an after-treatment. This may comprise a chemical treatment such as treatment with an acid, a thermal treatment or a combined thermal/chemical treatment.

It is often advantageous to use the compound of formula (1) in admixture with an assistant or extender such as anhydrous sodium sulfate, sodium sulfate decahydrate, sodium chloride, sodium carbonate, an alkali metal phosphate such as sodium or potassium orthophosphate, sodium or potassium pyrophosphate or sodium or potassium tripolyphosphate, or an alkali metal silicate such as sodium silicate.

In addition to the compounds of formula (1), a minor proportion of one or more adjuvants may also be employed in the method of the present invention. Examples of adjuvants include emulsifiers, perfumes, colouring dyes, opacifiers, optical whitening agents, bactericides, nonionic surfactants, fabric care ingredients, especially fabric softeners, stain release or stain repellant ingredients or water-proofing agents, anti-gelling agents such as nitrites or nitrates of alkali metals, especially sodium nitrate, and corrosion inhibitors such as sodium silicate.

The amount of each of these optional adjuvants should not exceed 1% by weight on the treated fibre.

The method of the present invention, in addition to providing protection to the skin, also increases the useful life of a textile article treated according to the present invention. In particular, the tear resistance and/or lighffastness of the treated textile fibre material may be improved.

Accordingly, the present invention still further provides a method of increasing the SPF rating of textile fibre material, comprising treating the textile fibre material with 0.05 to 3.0% by weight, based on the weight of the textile fibre material, of one or more compounds having the formula (1).

The present invention also provides a textile fabric produced from a fibre treated according to the method of the present invention as well as an article of clothing produced from the said fabric.

Such textile fabrics and articles of clothing produced from the said fabrics typically have an SPF rating of 20 and above whereas untreated cotton, for example, generally has an SPF rating of from 2 to 4.

The following Examples further illustrate the present invention.

EXAMPLE 1 ##STR22## 13.1 g. of 2-(2,4-dihydroxyphenyl)-4,6-diphenyl-1,3,5-triazine are stirred with 7.3 g. of potassium carbonate and 100 ml. of epichlorhydrin over 5 hours at 110° C. After cooling the reaction mixture to 25° C. and diluting it with 150 mls. of ethanol, the product which is thereby precipitated is filtered off, washed and dried in vacuum at 80° C. The compound (101) having the above structure is obtained in a yield corresponding to 88.1% of the theoretical yield and has the following elemental analysis by weight:

Analysis for C₂₇ H₁₉ N₃ O₃ : Req.% C 72.53; H 4.82; N 10.57 Found % C 72.3;H 4.9; N 10.4.

EXAMPLE 2 ##STR23## Using the procedure described in Example 1, but employing 2-(2,4-dihydroxyphenyl)-4,6-di(4'-2'-ethylhexoxy)phenyl- 1,3,5-triazine instead of 2-(2,4-dihydroxyphenyl)-4,6-diphenyl-1,3,5-triazine, compound (102) is obtained in a yield of 86.3% of the theoretical and has the following elemental analysis by weight:

Analysis for C₄₀ H₅₁ N₃ O_(5:) Req.% C 73.78; H 7.86; N 6.43 Found % C 73.3; H 8.05; N 6.13.

EXAMPLE 3 ##STR24## Using the procedure described in Example 1, but employing 2-(2,4-dihydroxyphenyl)-4,6-di(4'-dodecoxy)phenyl-1,3,5 -triazine instead of 2-(2,4-dihydroxyphenyl)-4,6-diphenyl-1,3,5-triazine, compound (103) is obtained in a yield of 86.3% of the theoretical and has the following elemental analysis by weight:

Analysis for C₄₈ H₆₇ N₃ O₅ : Req: % C 75.26; H 8.82; N 5.49 Found % C 75.1; H 8.8; N 5.5.

EXAMPLE 4 ##STR25## Using the procedure described in Example 1, but emplpoying 2-(2,4-dihydroxyphenyl)-4,6-dixylyl-1,3,5,-traizine instead of 2-(2,4-dihydroxyphenyl)-4,6-diphenyl-1,3,5,-trazine, compound (104) is obtained in a yield of 85% of the theoretical and the following element analysis by weight:

Analysis for C₂₈ H₂₇ N₃ O₃ : Req.% C 74.15; H 600N 9.26. Found % C 74.3; H 6.2;H 9.3. Compound (104) is known having been described in Example 6 of EP 526 399.

EXAMPLE 5 ##STR26## A) A mixture of 28.5 g. 2-(2,4-dihydroxyphenyl)-4,6-diphenyl-1,3,5-triazine, 9.4 g. potassium hydroxide, 31.2 g. chloracetamide and 650 mls. ethanol is stirred at 70° C. for 16 hours. After cooling, the precipitate is filtered off, washed with water and recrystallised twice from methylcellosolve.

17.5 g. of a light beige product (105a) are obtained in a yield corresponding to 52.5% of the theoretical yield. The product has the following elemental analysis by weight:

Analysis for C₂₃ H₁₈ N₄ O_(3:) Req.% C 67.73; H 4.66; N 13.74 Found % C 67.9; H 4.7; N 13.6. ##STR27## B) 8 g. of the compound (105a) are stirred in 250 mls. of dimethylacetamide and the mixture is rendered alkaline by the addition of 5 drops of 30% caustic soda solution. After the addition of 20 mls. of a 36% formalin solution, the reaction mixture is heated to 70° C. and stirred for 4 hours at this temperature. The reaction solution is poured into 1.5 liters of water and the resulting solid product is filtered off. After recrystallisation from dioxan, there are obtained 4.8 g. of a light yellow product, corresponding to a yield of 56% of the theoretical. The product (105b) has the following elemental analysis by weight:

Analysis for C₂₇ H₂₀ N₄ O₄. 0.33 H₂ O: Req.% C 66.30; H 4.75; N 12.89 Found % C 66.3; H 4.9; N 12.7.

EXAMPLE 6 ##STR28## Using the procedure described in Example 5, but employing 2,4-dihydroxybenzophenone instead of 2-(2,4-dihydroxyphenyl)-4,6-diphenyl-1,3,5-triazine, compound (106) is obtained in a yield of 56% of the theoretical and has the following elemental analysis by weight:

Analysis for C₁₆ H₁₅ NO₅. 0.55 H₂ O: Req.% C 58.4; H 4.9; N 4.26; H₂ O 2.99 Found % C 58.4; H 5.5; N 4.1; H₂ O 2.99.

EXAMPLE 7 ##STR29## 6.3 g. of the compound of formula ##STR30## are dissolved in 150 mls. of water at 60° C. and treated with 10 drops of 30% caustic soda solution. After the dropwise addition of 32.4 g. of a 37% formaldehyde solution, and subsequent stirring at 60-65° C. over 2.5 hours, 150 mls. of salt solution are added and the mixture is cooled to 10° C. The reaction mixture is filtered giving 7 g. of a solid product, corresponding to a yield of 93% of the theoretical. The product (107) has the following elemental analysis by weight:

Analysis for C₂₇ H₂₆ N₁₂ Na₂ O₁₀ S₂. 1 C₂ H₅ OH. 7.5H₂ O: Req.% C 33.47; H 4.93; N 18.00; S 6.87; Na 4.93 Found % C 33.4; H 4.7; N 17.5; S 6.7; Na 5.0.

EXAMPLE 8 ##STR31## 3.4 g. of cyanuric chloride are stirred in a mixture of 100 mls of acetone and 50 mls of water. The mixture is chilled to -10° C. and a solution of 5.5 g. of 4-aminostilbene-2-sulfonic acid sodium salt in 50 mls of water is added over 30 minutes, followed by 10 mls of 1M sodium carbonate solution.

The resulting mixture is stirred for 2 hours at -5° to -10° C. and the solid is filtered off and dried, giving 6.8 g. of a white product corresponding to a yield of 74% of theory.

The compound (108) has the following elemental analysis by weight:

Analysis for C₁₇ H₁₁ Cl₂ N₄ NaO₃ S. 1.26 H₂ O: Req.% C 43.63; H 2.91; N 11.97; S 6.85; Cl 15.15; H₂ O 4.85 Found % C 43.7; H 3.0; N 12.0; S 6.8; Cl 15.0.; H₂ O 4.85.

EXAMPLE 9 ##STR32## Using the same procedure as in Example 8 but replacing 4-aminostilbene-2-sulfonic acid by 4-aminostilbene-2,2'-disulfonic acid disodium salt, 15.1 g. of the compound of formula (109) are obtained, corresponding to a yield of 55% of theory.

The compound (109) has the following elemental analysis by weight:

Analysis for C₁₇ H₁₀ Cl₂ N₄ Na₂ O₆ S₂. 4.63 H₂ O: Req.% C 32.37; H 3.03; N 8.88; S 10.17; Cl 11.24; H₂ O 13.22 Found % C 32.4; H 3.0; N 8.9; S 10.0; Cl 11.5.; H₂ O 13.23.

EXAMPLE 10 ##STR33##

A) Using the procedure described in Example 8, prior to the filtration step, Compound (108) is produced as a white dispersion.

B) To this dispersion there are added 3 g. of 4-amino-ethylbenzoate, as a solid, followed by 10 mls of 1M sodium carbonate solution. The resulting pale yellow suspension is stirred for 18 hours at 25° C. and the solid product is filtered off and dried, giving 8.6 g. of the white compound of formula (110), corresponding to a yield of 83% of theory.

The compound (110) has the following elemental analysis by weight:

Analysis for C₂₆ H₂₁ ClN₅ NaO₅ S. 3.84 H₂ O. 0.14 NaCl: Req.% C 47.9; H 4.4; N 10.75; S 4.9; Cl 6.21; H₂ O 10.61 Found % C 47.9; H 4.4; N 10.8; S 4.8; Cl 6.5.; H₂ O 10.76.

EXAMPLE 11 ##STR34##

A) Using the procedure described in Example 8, prior to the filtration step, Compound (108) is produced as a white dispersion.

B) The procedure described in part B) of Example 10 is repeated except that 4-amino-ethylbenzoate is replaced by 4-amino-acetophenone. In this way, 4.8 g. of the white compound of formula (111) are produced, corresponding to a yield of 49% of theory.

The compound (111) has the following elemental analysis by weight:

Analysis for C₂₅ H₁₉ ClN₅ NaO₄ S. 3.96 H₂ O. 0.16 NaCl: Req.% C 48.0; H 4.31; N 11.2; S 5.12; Cl 6.59; H₂ O 11.40 Found% C 48.0;H4.4;N 11.3; S 5.1; Cl 6.4.; H₂ O 11.42.

EXAMPLE 12 ##STR35##

A) Using the procedure described in Example 9, prior to the filtration step, Compound (109) is produced as a dispersion.

B) The procedure in part B) of Example 10 is used for the reaction of the compound of formula (109) with 4-amino-ethylbenzoate to obtain 31.9 g. of the yellow compound (112), corresponding to a yield of 78.6% of theory.

The compound (112) has the following elemental analysis by weight:

Analysis for C₂₆ H₂₀ ClN₅ Na₂ O₈ S₂. 6H₂ O. 0.5 NaCl: Req.% C 38.4; H 3.94; N 8.6; S 7.8; Cl 6.5; H₂ O 13.28 Found % C 38.9; H 3.9; N 9.2; S 7.7; Cl 16.6.; H₂ O 12.67.

EXAMPLE 13 ##STR36##

The procedure in Example 12 is repeated except that, in part B), 4-amino-acetophenone is used instead of 4-amino-ethylbenzoate. In this way, 6.3 g. of compound (113) are obtained, corresponding to a yield of 49% of theory.

The compound (113) has the following elemental analysis by weight:

Analysis for C₂₅ H₁₈ ClN₅ Na₂ O₇ S₂. 4.61 H₂ O.: Req.% C 41.19; H 3.76; N 9.61; S 8.80; Cl 4.86; H₂ O 11.39 Found % C 41.4; H 3.8; N 9.7; S 8.6; Cl 5.3.; H₂ O 11.39.

EXAMPLE 14 ##STR37##

The procedure in Example 12 is repeated except that, in part B), 2-amino-pyrimidine is used instead of 4-amino-ethylbenzoate. In this way, 9.2 g. of compound (114) are obtained, corresponding to a yield of 61% of theory.

The compound (114) has the following elemental analysis by weight:

Analysis for C₂₁ H₁₄ ClN ₇ Na₂ O₆ S₂. 6 H₂ O. 0.33 NaCl: Req.% C 34.37; H 3.55; N 13.37; S 8.7; Cl 6.4; H₂ O 14.7 Found % C 34.4; H 3.6; N 13.9; S 8.5; Cl 6.3.; H₂ O 15.1.

EXAMPLE 15 ##STR38##

The procedure in Example 12 is repeated except that, in part B), sulfanilic acid is used instead of 4-amino-ethylbenzoate. In this way, 16.9 g. of compound (115) are obtained, corresponding to a yield of 57.9% of theory.

The compound (115) has the following elemental analysis by weight:

Analysis for C₂₅ H₁₅ ClN₅ Na₃ O₉ S₃. 10.67 H₂ O. 3.5 NaCl: Req.% C 25.7; H 3.11; N 6.0; S 8.22; Cl 13.7; H₂ O 16.45 Found % C 25.7; H 3.2; N 6.5; S 8.5; Cl 13.7.; H₂ O 16.4.

EXAMPLE 16 ##STR39##

The procedure in Example 12 is repeated except that, in part B), 2-(4-aminophenylsulfonyl)-ethylhydrogen sulfate is used instead of 4-amino-ethylbenzoate. In this way, 19.5 g. of compound (116) are obtained, corresponding to a yield of 60% of theory.

The compound (116) has the following elemental analysis by weight:

Analysis for C₂₅ H₂₁ ClN₅ Na₃ O₁₂ S₄. 8 H₂ O. 0.41 Na₂ SO_(4:) Req.% C 29.50; H 3.63; N 6.88; S 13.86; Cl 3.49; H₂ O 14.15 Found % C 29.5; H 3.50; N 7.0; S 13.7; Cl 3.7.; H₂ O 14.38.

EXAMPLE 17 ##STR40##

Using the procedure described in Example 8, 18.4 g. of cyanuric chloride are stirred in a mixture of 120 mls of acetone and 100 mls of water. The mixture is chilled to -10° C. and a solution of 25.4 g. of 4.4'-diaminostilbene-2,2'-disulfonic acid disodium salt in 50 mls of water is added over 30 minutes, followed by 50 mls of 1M sodium carbonate solution.

The resulting mixture is stirred for 2 hours at -5° to -10° C. and the solid is filtered off and dried, giving 24.1 g. of a white product corresponding to a yield of 67.9% of theory.

The compound (117) has the following elemental analysis by weight:

Analysis for C₂₀ H₁₀ Cl₄ N₈ Na₂ O₆ S₂. 5 H₂ O: Req.% C 30.01; H 2.51; N 14.00; S 8.01; Cl 17.62; Found % C 30.0; H 2.6; N 14.0; S 7.8; Cl 17.6.

EXAMPLE 18 ##STR41##

To the white suspension of the compound of formula (117) obtained in Example 17, prior to the filtration step, there is added 4-amino-ethylbenzoate in the manner described in Example 10.

In this way, 44.5 g. of compound (118) are obtained, corresponding to a yield of 92% of theory.

The compound (118) has the following elemental analysis by weight:

Analysis for C₃₈ H₃₀ Cl₂ N₁₀ Na₂ O₁₀ S₂. 6.5 H₂ O. 1 NaCl: Req.% C 40.0; H 3.77; N 12.28; Cl 9.34; H₂ O 10.26 Found % C 40.0; H 3.8; N 12.3; Cl 9.2.; H₂ O 10.0.

Example 19 ##STR42##

Using the procedure described in Example 18 but replacing 4-amino-ethylbenzoate by 4-amino-acetophenone, 29.1 g. of compound (119) are obtained, corresponding to a yield of 94.6% of theory.

The compound (119) has the following elemental analysis by weight:

Analysis for C₃₆ H₂₆ Cl₂ N₁₀ Na₂ O₈ S₂. 16 H₂ O. 0.6 NaCl: Req.% C 35.15; H 4.71; N 11.38; Cl 7.50; S 5.20; H₂ O 10.26 Found % C 35.1; H 4.8; N 11.5; Cl 7.7.; S 5.2; H₂ O 23.5.

EXAMPLE 20 ##STR43##

Using the procedure described in Example 18 but replacing 4-amino-ethylbenzoate by 2(4-aminophenylsulfonyl)-ethylhydrogensulfate, 46.2 g. of compound (120) are obtained, corresponding to a yield of 73.1% of theory.

The compound (120) has the following elemental analysis by weight:

Analysis for C₃₆ H₃₀ Cl₂ N₁₀ Na₄ O₁₈ S₆. 12.05 H₂ O. 18.2 NaCl: Req.% C 17.10; H 2.14; N 5.53; S 7.59; Cl 28.33; H₂ O 8.58 Found % C 17.1; H 2.1; N 5.6; S 7.5; Cl 28.6; H₂ O 8.58.

EXAMPLE 21 ##STR44##

Using the procedure described in Example 18 but replacing 4-amino-ethylbenzoate by 4-aminopyrimidine, 16.4 g. of compound (121) are obtained, corresponding to a yield of 79% of theory.

The compound (121) has the following elemental analysis by weight:

Analysis for C₂₆ H₁₈ Cl₂ N₁₄ Na₂ O₆ S₂. 7.3H₂ O. 0.7NaCl. 1CH₃ COCH_(3:) Req.% C 33.42; H 3.75; N 18.85; Cl 9.20; S 6.15 Found % C 33.3; H 3.5; N 19.0; Cl 9.3; S 6.1.

EXAMPLE 22 ##STR45##

Using the procedure described in Example 8 but replacing 4-amino-stilbene-2-sulfonic acid sodium salt by a mixture of sulfanilic acid and 4-aminoethylbenzoate, in the required stoichiometric proportions, 41 g. of the compound of formula (122) are obtained, corresponding to a yield of 87% of theory.

The compound (122) has the following elemental analysis by weight:

Analysis for C₁₈ H₁₅ ClN₅ NaO₅ S. 3.67 H₂ O: Req.% C 40.19; H 4.19; N 13.02; Cl 6.59; S 5.96; H₂ O 12.29 Found % C 40.4; H 4.2; N 13.1; Cl 6.59; S 6.1; H₂ O 12.3.

EXAMPLE 23 ##STR46##

Using the procedure described in Example 8 but replacing 4-amino-stilbene-2-sulfonic acid sodium salt by a mixture of sulfanilic acid and 4-aminoacetophenone, in the required stoichiometric proportions, 20. 1 g. of the compound of formula (123) are obtained, corresponding to a yield of 91% of theory.

The compound (123) has the following elemental analysis by weight:

Analysis for C₁₇ H₁₃ ClN₅ NaO₄ S. 4 H₂ O. 0.25 NaCl: Req.% C 38.64; H 3.97; N 13.24; Cl 8.38; S 6.06; H₂ O 13.62 Found% C 39.1;H 4.0;N 13.5;Cl 8.6;S 6.0;H₂ O 13.31.

EXAMPLE 24 ##STR47##

Using the procedure described in Example 8 but replacing 4-amino-stilbene-2-sulfonic acid sodium salt by a mixture of 2-(4-aminophenylsulfonyl)ethylhydrogen sulfate and 4-amino-ethylbenzoate, in the required stoichiometric proportions, 9.3 g. of the compound of formula (124) are obtained, corresponding to a yield of 73% of theory.

The compound (124) has the following elemental analysis by weight:

Analysis for C₂₀ H₁₉ ClN₅ NaO₈ S₂. 3.5 H₂ O. 4.5 NaCl: Req.% C 25.40; H 2.75; N 7.41; S 6.77; H₂ O 6.60 Found % C 25.4; H 2.6; N 7.4; S 6.2; H₂ O 6.5.

EXAMPLE 25 ##STR48##

Using the procedure described in Example 8 but replacing 4-amino-stilbene-2-sulfonic acid sodium salt by a mixture of 2-amino-pyrimidine and sulfanilic acid, in the required stoichiometric proportions, 17.2 g. of the compound of formula (125) are obtained, corresponding to a yield of 86% of theory.

The compound (125) has the following elemental analysis by weight:

Analysis for C₁₃ H₉ ClN₇ NaO₃ S. 4.55 H₂ O: Req.% C 32.28; H 3.77; N 20.27; S 6.63; Cl 7.33; H₂ O 16.95 Found % C 32.3; H 3.8; N 20.3; S 6.5; Cl 7.5; H₂ O 16.93.

EXAMPLE 26 ##STR49##

Using the procedure described in Example 8 but replacing 4-amino-stilbene-2-sulfonic acid sodium salt by a mixture of 2-(4-aminophenylsulfonyl)ethylhydrogen sulfate and 4-aminoacetophenone, in the required stoichiometric proportions, 8.9 g. of the compound of formula (126) are obtained, corresponding to a yield of 83% of theory.

The compound (126) has the following elemental analysis by weight:

Analysis for C₁₈ H₁₇ ClN₅ NaO₇ S₂. 3.38 H₂ O: Req.% C 36.10; H 4.00; N 11.70; S 10.71; Cl 5.92; H₂ O 10.17 Found % C 37.0; H 4.1; N 11.8; S 10.3; Cl 5.8; H₂ O 10.18.

EXAMPLE 27 ##STR50##

Using the procedure described in Example 8, compound (127) is prepared and has the following elemental analysis by weight:

Analysis for C₂₀ H₁₈ ClNaO₆ S. 1.83 H₂ O. 0.8 NaCl: Req.% C 41.31; H 3.78; N 9.64; S 5.51; Cl 11.00; H₂ O 5.68 Found % C 41.3; H 3.7; N 9.6; S 5.3; Cl 11.7; H₂ O 6.03.

EXAMPLE 28 ##STR51##

Using the procedure described in Example 8, compound (128) is prepared and has the following elemental analysis by weight:

Analysis for C₁₈ H₁₂ ClNaO₆ S. 4 H₂ O. 3.35 NaCl: Req.% C 29.23; H 2.71; N 7.58; S 4.33; Cl 20.9; H₂ O 9.37 Found % C 29.2; H 2.7; N 7.6; S 4.3; Cl 17.3; H₂ O 9.76.

EXAMPLE 29 ##STR52##

Using the procedure described in Example 18, compound (129) is prepared and has the following elemental analysis by weight:

Analysis for C₃₈ H₂₄ Cl₂ N₈ Na₂ O₁₂ S₂. 11.69 H₂ O: Req.% C 38.80; H 4.06; N 9.53; S 5.45; Cl 6.03; H₂ O 17.90 Found % C 38.2; H 4.0; N 9.4; S 5.3; Cl 6.2; H₂ O 17.91.

EXAMPLE 30 ##STR53##

Using the procedure described in Example 18, compound (130) is prepared and has the following elemental analysis by weight:

Analysis for C₃₄ H₂₆ Cl₂ N₁₀ Na₂ O₈ S₂. 7.60 H₂ O: Req.% C 40.01; H 4.07; N 13.72; S 6.28; Cl 6.95; H₂ O 13.42 Found % C 41.1; H 3.8; N 14.3; S 5.8; Cl 7.5; H₂ O 13.41.

EXAMPLE 31 TO 33

Separate samples of bleached cotton cretonne are foularded (80% liquor uptake) with an aqueous bath containing:

2 g/1 40% acetic acid

250 g/1 product of Example 1, 3 or 4

to provide a concentration of 1% by weight of active ingredient on the cotton substrate.

As the product of Example 1, 3 or 4 is insoluble in water, it is added as a 5% (w/w) aqueous dispersion which is obtained by milling 5% of the product of Example 1, 3 or 4 and 1% of Pluronic F 108 (polypropylene glycol containing 80% ethylene oxide) in the presence of glass beads in deionised water.

The foularding is conducted at either alkaline pH (pH adjusted to 10-11 with soda) or at acidic pH (pH adjusted to 4-4.5 with acetic acid). Drying of the treated cotton samples is effected at 80° C. for two minutes, followed by thermofixing for one minute at 170° C.

The Sun Protection Factor (SPF) is determined by measurement of the UV light transmitted through the swatch, using a double grating spectrophotometer fitted with an Ulbricht bowl. Calculation of SPF is conducted as described by B. L. Diffey and J.Robson in J. Soc. Cosm. Chem. 40 (1989), pp. 130-131.

In order to evaluate the wash fastness of the treated cotton samples, respective samples are washed once, five times or ten times in an aqueous bath containing 7 g/l of a standard ECE detergent having the composition (weight %):

8.0% Sodium alkylbenzene sulfonate

2.9% Tallow alcohol-tetradecane-ethylene glycol ether (14 mols EO)

3.5% Sodium soap

43.8% Sodium tripolyphosphate

7.5% Sodium silicate

1.9% Magnesium silicate

1.2% Carboxymethyl cellulose

0.2% EDTA

21.2% Sodium sulfate Water to 100%.

Each wash is conducted at 60° C. for 15 minutes at a liquor ratio of 1:10.

The results obtained are set out in the following Table 1.

                  TABLE 1                                                          ______________________________________                                                      Treatment                                                                             SPF                                                                     alkaline/                                                                             number of washes                                           Example                                                                               Test UVA    acidic   none one  five  ten                                ______________________________________                                         --     none (control)                                                                             acidic   4.2       4.2                                      31     cpd. of Ex. 1                                                                              alkaline 41   47   31    35                                 32     cpd. of Ex. 4                                                                              alkaline 46   53   53    51                                                    acidic   42   42   60    59                                 33     cpd. of Ex. 3                                                                              acidic   38   --   --    44                                 ______________________________________                                    

EXAMPLE 34

Separate samples of bleached cotton cretonne are foularded (80% liquor uptake) with an aqueous bath containing:

2 g/l 40% acetic acid

12.5 g/l product of Example 2

to provide a concentration of 1% by weight of active ingredient on the cotton substrate.

As the product of Example 2 is insoluble in water, it is added as a 100% (w/w) aqueous dispersion which is obtained by milling 100% of the product of Example 2 and 1% of Pluronic F 108 in the presence of glass beads in deionised water.

The remaining procedure is as described in Examples 31 to 33.

The results obtained are set out in the following Table 2.

                  TABLE 2                                                          ______________________________________                                                      Treatment                                                                             SPF                                                                     alkaline/                                                                             number of washes                                           Example                                                                               Test UVA    acidic   none one  five  ten                                ______________________________________                                         --     none (control)                                                                             acidic   5.4  5.4  5.1   4.9                                34     cpd. of Ex. 2                                                                              acidic   30   38   34    37                                 ______________________________________                                    

EXAMPLE 35

Separate samples of bleached cotton cretonne are foularded (80% liquor uptake) with an aqueous bath containing:

15 g/l MgCl₂

250 g/l product of Example 5b to provide a concentration of 1% by weight of active ingredient on the cotton substrate.

As the product of Example 5b is insoluble in water, it is added as a 5% (w/w) aqueous dispersion which is obtained by milling 5% of the product of Example 5b and 1% of Plutonic F 108 in the presence of glass beads in deionised water.

The remaining procedure is as described in Examples 31 to 33.

The results obtained are set out in the following Table 3.

                  TABLE 3                                                          ______________________________________                                                      Treatment                                                                             SPF                                                                     alkaline/                                                                             number of washes                                           Example                                                                               Test UVA    acidic   none one  five  ten                                ______________________________________                                         --     none (control)                                                                             acidic   5.4  5.4  5.1   4.9                                35     cpd. of Ex. 5b                                                                             slightly 36   32   27    21                                                    acidic                                                      ______________________________________                                    

EXAMPLES 36 AND 37

Separate samples of bleached cotton cretonne are foularded (80% liquor uptake) with an aqueous bath containing:

5 g/l NH₄ Cl

250 g/l product of Example 5b or 6

to provide a concentration of 1% by weight of active ingredient (product of Example 5b) or 0.2% by weight of active ingredient (product of Example 6), each based on the cotton substrate.

As the product of Example 5b or 6 is insoluble in water, it is added as a 5% (w/w) aqueous dispersion which is obtained by milling 5% of the product of Example 5b or 6 and 1% of Pluronic F 108 in the presence of glass beads in deionised water.

The remaining procedure is as described in Examples 31 to 33.

The results obtained are set out in the following Table 4.

                  TABLE 4                                                          ______________________________________                                                     Treatment                                                                               SPF                                                                   alkaline/                                                                               number of washes                                          Example                                                                               Test UVA   acidic     none one  five ten                                ______________________________________                                         --     none (control)                                                                            slightly acidic                                                                           5.4  5.4  5.1  4.9                                36     cpd. of Ex. 5b                                                                            slightly acidic                                                                           37   35   47   55                                 37     cpd. of Ex. 6                                                                             slightly acidic                                                                           17   23   18   19                                 ______________________________________                                    

EXAMPLE 38

Separate samples of bleached cotton cretonne are foularded (80% liquor uptake) with an aqueous bath containing:

5 g/l MgCl₂

250 g/l product of Example 7

to provide a concentration of 0.1% or 0.5% by weight of active ingredient on the cotton substrate.

As the product of Example 7 is insoluble in water, it is added as a 5% (w/w) aqueous dispersion which is obtained by milling 5% of the product of Example 7 and 1% of Pluronic F 108 in the presence of glass beads in deionised water.

The remaining procedure is as described in Examples 31 to 33.

The results obtained are set out in the following Table 5.

                  TABLE 5                                                          ______________________________________                                                                  Treatment                                                                             SPF                                            Ex-              Concn.  alkaline/                                                                             number of washes                               ample Test UVA   FWA     acidic none one  five ten                             ______________________________________                                         --    none (control)                                                                            --      acidic 4.1  4.1  4.1  4.2                             38    cpd. of Ex. 7                                                                             0.1%    slightly                                                                              10   15   12   12                                               0.5%    acidic 23   26   27   27                              ______________________________________                                    

EXAMPLES 39 TO 51

Separate samples of bleached cotton cretonne are foularded (80% liquor uptake) with an aqueous bath containing:

10 g/l Na₂ SO₄

50 g/l product of relevant Example

to provide a concentration of 0.1% or 0.2% by weight of active ingredient on the cotton substrate.

As the products of the relevant Examples are insoluble in water, they are added as a 5% (w/w) aqueous dispersion which is obtained by milling 5% of the product of the relevant Example and 1% of Pluronic F 108 in the presence of glass beads in deionised water.

The remaining procedure is as described in Examples 31 to 33.

The results obtained are set out in the following Table 6.

                  TABLE 6                                                          ______________________________________                                                                  Treatment                                                                             SPF                                            Ex-              Concn.  alkaline/                                                                             number of washes                               ample Test UVA   FWA     acidic none one  five ten                             ______________________________________                                         --    none (control)                                                                            --      neutral                                                                               7    5    5    6                               39    cpd. of Ex. 8                                                                             0.2%    neutral                                                                               34   22   29   29                              40    cpd. of Ex. 10                                                                            0.1%    neutral                                                                               29   31   22   19                              41    cpd. of Ex. 23                                                                            0.2%    neutral                                                                               41   22   16   13                              42    cpd. of Ex. 11                                                                            0.1%    neutral                                                                               39   36   22   23                              43    cpd. of Ex. 19                                                                            0.2%    neutral                                                                               26   40   36   29                              44    cpd. of Ex. 21                                                                            0.1%    neutral                                                                               21   19   13   11                              45    cpd. of Ex. 26                                                                            0.2%    neutral                                                                               18   14   9    12                              46    cpd. of Ex. 29                                                                            0.2%    neutral                                                                               30   34   31   28                              47    cpd. of Ex. 30                                                                            0.2%    neutral                                                                               38   23   22   20                              48    cpd. of Ex. 17                                                                            0.2%    neutral                                                                               18   13   7    15                              49    cpd. of Ex. 18                                                                            0.2%    neutral                                                                               29   36   21   19                              50    cpd. of Ex. 20                                                                            0.2%    neutral                                                                               28   32   31   28                              51    cpd. of Ex. 22                                                                            0.2%    neutral                                                                               20   13   8    7                               ______________________________________                                    

EXAMPLE 52 to 55

Separate samples of bleached cotton cretonne are foularded (80% liquor uptake) with an aqueous bath containing:

4 g/l NaHCO₃ H

50 g/l urea

50 g/l product of relevant Example to provide a concentration of 0.2% by weight of active ingredient on the cotton substrate.

As the products of the relevant Examples are insoluble in water, they are added as a 5% (w/w) aqueous dispersion which is obtained by milling 5% of the product of the relevant Example and 1% of Pluronic F 108 in the presence of glass beads in deionised water.

The remaining procedure is as described in Examples 31 to 33 except that the thermofixing is conducted for 2 minutes at 130° C.

The results obtained are set out in the following Table 7.

                  TABLE 7                                                          ______________________________________                                                                    SPF                                                                    Concn.  number of washes                                    Example Test UVA   UVA     none  one  five ten                                 ______________________________________                                         --      none (control)                                                                            --      7     5    5    4                                   52      cpd. of Ex. 17                                                                            0.2%    28    15   15   24                                  53      cpd. of Ex. 18                                                                            0.2%    45    49   45   34                                  54      cpd. of Ex. 20                                                                            0.2%    33    35   36   48                                  55      cpd. of Ex. 6                                                                             0.2%    29    27   26   21                                  ______________________________________                                    

The results in the Tables 1 to 7 demonstrate the substantial increase in the SPF values of cotton samples treated according to the present invention and that cotton samples treated according to the present invention are fast to washing. 

We claim:
 1. A compound of the formula: ##STR54## in which m is 1 or 2; when m is 1, A is a residue selected from those of the formulae: ##STR55## and, when m is 2, A is a residue of the formula: ##STR56## in which R is phenyl, optionally substituted by 1 or 2 C₁ -C₄ alkyl groups, or by 1 or 2 C₁ -C₁₈ alkoxy groups, or R is a group selected from those having one of the formulae: ##STR57## X is F, Cl or NHCH₂ OH; X₁ is F, Cl, NHCH₂ OH or a group selected from those of the formulae: ##STR58## B is --O--, --NH-- or --SO₂ --; and D is a group selected from those of the formulae: ##STR59## CH₂ --C(═O)--NH(CH₂ OH), CH₂ --C(═O)--N(CH₂ OH)₂ and CH₂ CH₂ --OSO₃ M in which is hydrogen, sodium, potassium, calcium, magnesium, ammonium, mono-, di-, tri- or tetra-C₁ -C₄ alkyl-ammonium, or ammonium that is di- or tri-substituted by a mixture of C₁ -C₄ alkyl and C₁ -C₄ hydroxyalkyl groups or, when A is a residue of formula (5) or (6), D may also be a group selected from those having one of the formulae: ##STR60## in which M has its previous significance and n is 0 or 1, provided that at least one SO₃ M group is present, or D has the formula: ##STR61## in which X, X₁ and M have their previous significance; provided that those compounds of formula (1) are excluded in which A is a residue of formula (2) wherein R has its previous significance, m is 1, B is --NH-- or --SO₂ --; and D is a group of formula CH₂ CH₂ --OSO₃ M in which M has its previous significance and provided that the compounds 4,4'-bis-(4",6"-dichlorotriazin-2"-ylamino)stilbene-2,2'-disulfonic acid and its sodium salt, 2-(2-hydroxy-4-glycidyloxy)-4,6-(2,4-dimethylphenyl)-1,3,5-triazine and 2-(2-hydroxy-4-glycidyloxy)-4,6-(4-methylphenyl)-1,3,5-triazine are excluded.
 2. A compound according to claim 1 in which R is tolyl of xylyl.
 3. A compound according claim 1 in which M is sodium.
 4. A compound according claim 1 in which the compound of formula (1) has the formula: ##STR62## in which R is as defined in claim 1 and D₁ is a group having the formula ##STR63## CH₂ --C(═O)--NH(CH₂ OH) or CH₂ --C(═O)--N(CH₂ OH)₂.
 5. A compound according to claim 1 in which the compound of formula ( 1) has the formula: ##STR64## in which X is F or Cl and B and M are each as defined in claim
 1. 6. A compound according to claim 1 in which the compound of formula (1) has the formula: ##STR65## in which X is F or Cl and B and M are each as defined in claim
 1. 7. A compound according to claim 1 in which the compound of formula (1) has the formula: ##STR66## in which X is F or Cl and B and M are each as defined in claim
 1. 8. A compound according to claim 5 in which X is Cl B is NH and M is Na.
 9. A compound according to claim 1 in which the compound of formula (1) has the formula: ##STR67## in which M and n are as defined in claim 1, provided that at least one SO₃ M group is present, X is F or Cl and X₁ is F, Cl or a group having one of the formulae: ##STR68## in which B and M are each as defined in claim
 1. 10. A compound according to claim 9 in which X is Cl B is NH and M is Na.
 11. A compound according to claim 1 in which the compound of formula (1) has the formula: ##STR69## in which each X is the same and is F or Cl and each X₁ is the same and is F, Cl or a group having the formula: ##STR70## in which B and M are each as defined in claim
 1. 12. A compound according to claim 11 in which each X is Cl, B is NH and M is Na.
 13. A compound according to claim 1 in which the compound of formula (1) has the formula: ##STR71## in which M is as defined in claim
 1. 14. A compound according to claim 13 in which M is Na. 